Answer:
Radioactive isotopes are unstable and will decay. ... The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope.
The area of square a is 100
Answer:
the correct one is time-management
Answer:
Corect and yes so yes cool
Its 3
Explanation:
D. three-quarters of earth's water is fresh water.
